This card was printed in the following sets:

Card Name: Symbol Set Block
Mitotic Slime Magic 2011 (Rare) Magic 2011 Core Sets
Mitotic Slime Planechase 2012 Edition (Rare) Planechase 2012 Edition Miscellaneous
Mitotic Slime Planechase Anthology (Rare) Planechase Anthology General
Mitotic Slime Streets of New Capenna Commander (Rare) Streets of New Capenna Commander

This card has restrictions in the following formats:

Format Legality
Modern Legal
Legacy Legal
Vintage Legal
Commander Legal
x For more information regarding each format and play style modifications, visit the Banned / Restricted Lists for DCI-Sanctioned Tournaments page on the Magic: The Gathering website.

Gatherer works better in the Companion app!